Help & FAQ
Everything you need to know about using Chessplain
Chessplain is in Beta
We're actively building and improving Chessplain. Some features are still being developed.
Currently Available:
- Chess game analysis with Stockfish engine
- AI-powered position explanations (quick and deep dive)
- Move classification (blunder, mistake, good move, etc.)
- Interactive chess board
- Premium subscriptions
Coming Soon:
- Game history and library
- User settings and profile customization
- Chess.com and Lichess imports
- Export annotated PGN files
Getting Started
1. Sign Up
Create an account using Google OAuth. It's quick, secure, and free to start.
2. Upload a Game
On the Analyze page, upload a chess game in PGN format. You can:
- Upload a PGN file from your computer
- Paste PGN text directly
- Import from Chess.com or Lichess (coming soon)
3. Review Your Analysis
Once analyzed, you'll see:
- Interactive board with all moves
- Position evaluation and classification
- Critical positions automatically highlighted
- Quick AI explanations for each position
4. Deep Dive Analysis
For critical positions, click "Deep Dive" to get detailed, comprehensive AI explanations of what went wrong and how to improve.
Features Explained
Quick Analysis (Unlimited)
Powered by our expert-level AI engine for fast, concise explanations of positions. Available for all users without limits.
Deep Dive Analysis
Powered by our grandmaster-level AI for comprehensive, detailed analysis. Free users get 3 per day, Premium users get unlimited.
Position Classification
Each move is automatically classified as:
- Brilliant: An exceptional move
- Great: A very strong move
- Best: The optimal move
- Good: A solid move
- Inaccuracy: A slight mistake (0.5-1.0 eval loss)
- Mistake: A clear error (1.0-2.0 eval loss)
- Blunder: A serious mistake (>2.0 eval loss)
Critical Positions
We automatically identify turning points in your game - positions where a mistake or good move significantly changed the evaluation. These are the most important positions to study.
Subscription Questions
What's included in the free tier?
5 game analyses per day, unlimited Stockfish move classification, and 3 AI deep dive analyses per day.
What do I get with Premium?
Unlimited everything: game analyses, AI explanations, and deep dives. Plus enhanced analysis depth and auto-loading of critical position explanations.
Is there a free trial?
Yes! New users get a 7-day free trial of Premium. No credit card required upfront.
Can I cancel anytime?
Absolutely. Cancel anytime from your profile page. You'll keep Premium access until the end of your billing period. See our Refund Policy for details.
When do limits reset?
Daily limits reset at midnight UTC every day.
Common Questions
What PGN format do you support?
Standard PGN format with move notation. We support games from Chess.com, Lichess, and other platforms.
Can I analyze games from online platforms?
Direct import from Chess.com and Lichess is coming soon. For now, export your games as PGN and upload them.
How accurate is the analysis?
We use Stockfish, one of the strongest chess engines in the world, for position evaluation. AI explanations are generated by our advanced language models, providing accurate and educational insights.
Is my data private?
Yes. Your games and analyses are private and only visible to you. We use Row-Level Security to ensure data isolation. See our Privacy Policy for details.
I found a bug. How do I report it?
Email us at support@chessplain.com with details about the issue. We appreciate your help making Chessplain better!